Annabergite and Cinnabar Physical Properties

Annabergite

Cinnabar

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Physical Properties

Tenacity

Sectile

Slightly sectile

Solubility

1.04 x 10⁻²⁵ g per 100 ml water (Ksp at 25°C = 2 x 10⁻³²)

Durability

Specific Gravity

3.072

1 7.18

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Fracture

Uneven

Cleavage

Perfect on {010}, indistinct on {100} and {102}

Prismatic {10 1 0}, perfect

Mohs Hardness

22-2.5

2 10

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Chemical Composition

Ni3(AsO4)2•8(H2O)

HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Annabergite and Cinnabar Chemical Formula

While comparing Annabergite and Cinnabar physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Annabergite and Cinnabar chemical formula.

Chemical formula of Annabergite- Ni3(AsO4)2•8(H2O)
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Annabergite and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Annabergite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Annabergite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Annabergite is 2 whereas that of Cinnabar is 2.